好的,我用该代码解决了这个问题:
在我的登录活动(第一个活动)中,我需要传递用户名和密码字符串:
btnLogin.setOnClickListener(new OnClickListener(){
        public void onClick(View v) {               
            String userName = txtUsername.getText().toString();
            String password = txtPass.getText().toString();
            //instance for UserFunctions.
            UserFunctions userFunction = new UserFunctions();
            JSONObject json = userFunction.loginUser(userName, password);
            //Check login response
            try {
                if(json.getString(KEY_REQUESTRESULT)!= null ){
                    txtErrorM.setText("");
                    //Log.e("Passed fine:", "first if condition");
                    String res = json.getString(KEY_REQUESTRESULT);//Obtaining the value 0 or 1 from the KEY loginstatus from JSONObject.
                if(Integer.parseInt(res) == 1){
                    Intent iii = new Intent("com.mariposatraining.courses.MariposaTrainingActivity");
                    Bundle bundle1 = new Bundle();
                    Bundle bundle2 = new Bundle();
                    bundle1.putString("UN", userName);
                    bundle2.putString("PW", password);
                    iii.putExtras(bundle1);
                    iii.putExtras(bundle2);
                    //iii.putExtra("userName", userName);
                    //iii.putExtra("Password", password);                       
                    startActivity(iii);
                    finish();
                    //Log.e("OBJECTOO", json.toString());
                }
我将此字符串发送到 TAB HANDLER CLASS,然后发送到管理此信息的活动:
public class MariposaTrainingActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
    WindowManager.LayoutParams.FLAG_FULLSCREEN); 
    setContentView(R.layout.main);
    TabHost tabHost = getTabHost();
    TabHost.TabSpec spec ; //recurse to the property tabs
    Intent intent; //intent for open tabs
    //created intent for open the class tab1
    intent = new Intent().setClass(this, ListViewerIncompleted.class); //List 2 Incompleted
    spec = tabHost.newTabSpec("ListViewerIncompleted").setIndicator("INCOMPLETED").setContent(intent);
    tabHost.addTab(spec);
    Bundle bundle1 = getIntent().getExtras();
    String userName=bundle1.getString("UN");
    Bundle bundle2 = getIntent().getExtras();
    String password=bundle2.getString("PW");
    Bundle bundle3 = new Bundle();
    Bundle bundle4 = new Bundle();
    bundle3.putString("UN", userName);
    bundle4.putString("PW", password);
    intent.putExtras(bundle3);
    intent.putExtras(bundle4);}}
在类中使用此信息:
 Bundle bundle3 = getIntent().getExtras();
    String userName=bundle3.getString("UN");   //Getting the userName
    Bundle bundle4 = getIntent().getExtras();
    String password=bundle4.getString("PW");
希望这能给你一些想法......